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AddressCache.js
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AddressCache.js
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'use strict';
const _ = require('lodash');
class AddressCache {
constructor() {
this._cache = new Map();
}
/**
* @param {string} key
* @returns {Address[]|undefined}
*/
find(key) {
if (!this._cache.has(key)) {
return;
}
const addresses = this._cache.get(key);
if (this._isExpired(addresses)) {
return;
}
return addresses;
}
/**
* @param {string} key
* @param {Address[]} addresses
*/
set(key, addresses) {
this._cache.set(key, addresses);
}
/**
* @param {Address[]} addresses
* @returns {boolean}
* @private
*/
_isExpired(addresses) {
if (_.isEmpty(addresses)) {
return true;
}
return addresses.some(address => address.expiredTime <= Date.now());
}
}
module.exports = AddressCache;